The formula to calculate the Back Pitch for DC Machine is:
\[ Y_b = \frac{(2 \cdot n_{slot})}{P} + 1 \]
Back Pitch refers to the distance between two consecutive sides of a coil measured along the surface of the armature. Number of Slots depends on various factors such as the size of the generator, the type of winding used, the desired output voltage, and the power rating. Number of Poles refers to the total count of poles in an electrical machine for the flux generation.
Let's assume the following values:
Using the formula:
\[ Y_b = \frac{(2 \cdot 96)}{9} + 1 = 22.3333333333333 \]
| Number of Slots (nslot) | Number of Poles (P) | Back Pitch (Yb) |
|---|---|---|
| 90 | 9 | 21.000000000000000 |
| 91 | 9 | 21.222222222222221 |
| 92 | 9 | 21.444444444444443 |
| 93 | 9 | 21.666666666666668 |
| 94 | 9 | 21.888888888888889 |
| 95 | 9 | 22.111111111111111 |
| 96 | 9 | 22.333333333333332 |
| 97 | 9 | 22.555555555555557 |
| 98 | 9 | 22.777777777777779 |
| 99 | 9 | 23.000000000000000 |
| 100 | 9 | 23.222222222222221 |